What kind are these corals can they touch each other

[Ettore]

I clued all 3 together friend gave me little pieces Believe it was smaller than that and that’s a regular size frag plug lol Can they touch each other

 

[Ron Reefman]

Almost impossible to say given that photo and not knowing what corals they are.

Corals are kind of like people. Some get along great, some tolerate each other and some will flat out kill the other.

 

[tsouth]

Hard to tell but honestly just play it safe and separate them out. There's no harm and its better to be safe than sorry. Congrats on the new frags!

I think the top left one is a pavona? which is already a no-go for touching others.